What's changed in this decade is girls are now expressing an interest. "On college campuses it's escalated," Kuriansky said. "There's more talk, more books, more videos."
One speaker on the college circuit -- Tristan Taormino, author of "The Ultimate Guide to Anal Sex for Women" -- is gaining new ground with young women.
But, Kuriansky said, with fewer educational media outlets and less sex education, young girls are clueless about hygiene, possible bladder or vaginal infections and life-threatening diseases like AIDS.
"We are more open, but there's less information," Kuriansky said. "There are real myths and real efforts to be cool and people running around saying how great it is."
"But it's not just rubbing elbows," she said. "Anal sex is a serious public problem."
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